Millimetre-scale headshield slugs with a forward siphon, in strong colours.
Headshield slugs of two to ten millimetres, most of them strongly coloured in yellow, orange, black, white and blue, with a short siphon projecting forward from the front of the headshield and a pair of parapodial flaps folded over the back. The siphon is the character that places the genus. Below that the picture is unsettled: several of the animals photographed on these coasts have no published name, and colour pattern alone does not settle a species.
They are found on sand, silt and fine rubble, and on algae and hydroid turf, mostly at night, moving slowly and more or less continuously. Size is the whole problem. At this scale the animal is a coloured speck on the sediment, and it is usually found by a guide working over a small area rather than by covering ground. Recorded from a few metres down to about 25 m.
Ratings are per location: 1 means found on most dives that look for it, 5 means a handful of records. Where enough dives have been logged the figure is calculated from them; otherwise it is an editorial estimate, and says so. We publish habitat and destination, not the dive site.
